first-mentioned partition. The trimming joist is 11 in. by 3½ in., and is placed 18 in. from the chimney-breast. The short trimmers are 11 in. by 3 in. and represented not as resting in the party wall, but as being supported on iron corbels built in the wall. Fig. 316 shows, to the left, an isometric view of the tusked and keyed joint to the trimming round chimney-breast; to the right, it shows a sectional isometric view through joint of trimmer and tailing joist. It also represents the kind of joint that
Fig. 320.—Plan of Trimming round Fireplace.
Fig. 321—Cross Section through Coach Head Arch, Trimmer, Hearth, etc.
Fig. 322.—View showing Under Side of Arch, Trimming, and the Tie Bolt.
Fig. 323.
Fig. 324.
Figs. 323 and 324.—Alternative Methods of Housing Joists to Trimmers.
